Perl> use Devel::Peek;;
Perl> $n = 9_999_999_998; print Dump( $n ); print $n & 1; print Dump( $n );;

SV = NV(0x1844044) at 0x19920c4
  REFCNT = 1
  FLAGS = (NOK,pNOK)
  NV = 9999999998

1
SV = PVNV(0x1985a0c) at 0x19920c4
  REFCNT = 1
  FLAGS = (NOK,pIOK,pNOK,IsUV)
  UV = 4294967295
  NV = 9999999998
  PV = 0

##</code><code>##

Perl> $c++ for 1 .. 2**32;;
[Range iterator outside integer range at (eval 7) line 1, <STDIN> line 3.